123031013004 has 72 divisors (see below), whose sum is σ = 335501974080. Its totient is φ = 37869691392.

The previous prime is 123031012961. The next prime is 123031013009. The reversal of 123031013004 is 400310130321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (123031013009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1864084 + ... + 1928955.

It is an arithmetic number, because the mean of its divisors is an integer number (4659749640).

Almost surely, 2^123031013004 is an apocalyptic number.

It is an amenable number.

123031013004 is an abundant number, since it is smaller than the sum of its proper divisors (212470961076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123031013004 is a wasteful number, since it uses less digits than its factorization.

123031013004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793119 (or 3793114 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 123031013004 its reverse (400310130321), we get a palindrome (523341143325).

The spelling of 123031013004 in words is "one hundred twenty-three billion, thirty-one million, thirteen thousand, four".